[milo] Refactor all html knowledge out of backends.

milo/frontend/middleware_test.go

 // Copyright 2016 The LUCI Authors.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //      http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package common
+package frontend
 
 import (
         "testing"
         "time"
 
         . "github.com/smartystreets/goconvey/convey"
 )
 
 func TestFuncs(t *testing.T) {
         t.Parallel()
 
         Convey("humanDuration", t, func() {
                 Convey("3 hrs", func() {
                         h := humanDuration(3 * time.Hour)
                         So(h, ShouldEqual, "3 hrs")
                 })
 
                 Convey("2 hrs 59 mins", func() {
                         h := humanDuration(2*time.Hour + 59*time.Minute)
                         So(h, ShouldEqual, "2 hrs 59 mins")
                 })
         })
 }